This thesis proposes the usage of a proactive Web Crawler to fight against cybercrimes, specially phishing and cybersquatting. According to the FBI, more than 300,000 citizens of the United States were victim to phishing scams in 2022, with a reported loss of 52 million United States Dollars. Criminals exploit the reputation of famous brands to promote false copycat websites, false virus and promotional messages and steal money and personal data from unsuspicious users. This tool collects data that can be later used to create evidence and notify authorities about the fraudulent activities, helping them block malicious websites more quickly. The proposed approach is to monitor on a daily basis a list of potentially harmful domains, collecting DNS records, SSL certificates and WHOIS information, as well as screenshotting the home page of each candidate.